Fire resistant organosiloxane elastomer foams and method of preparing same

Claim 1

A METHOD OF PREPARING A FIRE RESISTANT SILOXANE ELAS TOMERIC FOAM WHICH COMPRISES MIXING (1) AN ORGANOPOLYSILOXANE CONTAINING SILICON-BONDED OH GROUPS AND HAVING A VISCOSITY OF AT LEAST 50 CS. AT 25*C. AND HAVING PER SILICON ATOM ON THE AVERAGE FROM 1.9 TO 2 RADICALS OF THE GROUP CONSISTING OF MONOVALENT HYDROCARBON RADICALS, HALOGENATED MONOVALENT HYDROCARBON RADICALS AND HYDROGEN ATOMS, IN SAID SILOXANE THERE BEING FROM 1 TO 75% BY WEIGHT SILOXANE UNITS CONTAINING AT LEAST ONE SILICONBONDED HYDROGEN ATOM AND SAID SILOXANE CONTAINING ON AVERAGE OF AT LEAST 1.25 OF TOTAL MONOVALENT AND HALOGENATED MONOVALENT HYDROCARBON RADICALS PER SILICON ATOM, (2) UP TO 50% BY WEIGHT BASED ON THE WEIGHT OF SILOXANE (1) OF A HYDROXYLATED COMPOUND SELECTED FROM THE GROUP CONSISTING OF SILANOLS, LOW MOLECULAR WEIGHT HYDROXYLATED SILOXANES, WATER, CARBOXYLIC ACIDS AND ALCOHOLS OF LESS THAN TWELVE CARBON ATOMS, (3) STANNOUS SALT OF A CARBOXYLIC ACID IN AMOUNT SUFFICIENT TO GIVE FROM .1 TO 10% BY WEIGHT TIN BASED ON THE WEIGHT OF (1), (2) AND (3) (1) AND (4) AT LEAST 5% BY WEIGHT OF (1), (2) AND (3) OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF NICKELOUS BROMIDE, AROMATIC PENTABROMO ETHYL BENZENE AND AROMATIC PENTABROMO TOLUENE, AND THEREAFTER ALLOWING THE MIXTURE TO FOAM.

Claim 2

A METHOD OF PREPARING A FIRE RESISTANT SILOXANE ELAS TOMERIC FOAM WHICH COMPRISES MIXING (1) AN ORGANOPOLYSILOXANE CONTAINING SILICON-BONDED OH GROUPS AND HAVING A VISCOSITY OF AT LEAST 50 CS. AT 25*C. AND HAVING PER SILICON ATOM ON THE AVERAGE FROM 1.9 TO 2 RADICALS OF THE GROUP CONSISTING OF MONOVALENT HYDROCARBON RADICALS, HALOGENATED MONOVALENT HYDROCARBON RADICALS AND HYDROGEN ATOMS, IN SAID SILOXANE THERE BEING FROM 1 TO 75% BY WEIGHT SILOXANE UNITS CONTAINING AT LEAST ONE SILICONBONDED HYDROGEN ATOM AND SAID SILOXANE CONTAINING ON AVERAGE OF AT LEAST 1.25 OF TOTAL MONOVALENT AND HALOGENATED MONOVALENT HYDROCARBON RADICALS PER SILICON ATOM, (2) UP TO 50% BY WEIGHT BASED ON THE WEIGHT OF SILOXANE (1) OF A HYDROXYLATED COMPOUND SELECTED FROM THE GROUP CONSISTING OF SILANOLS, LOW MOLECULAR WEIGHT HYDROXYLATED SILOXANES, WATER, CARBOXYLIC ACIDS AND ALCOHOLS OF LESS THAN TWELVE CARBON ATOMS, (3) STANNOUS SALT OF A CARBOXYLIC ACID IN AMOUNT SUFFICIENT TO GIVE FROM .1 TO 10% BY WEIGHT TIN BASED ON THE WEIGHT OF (1), (2) AND (3) (1) AND (4) AT LEAST 5% BY WEIGHT OF (1), (2) AND (3) OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF NICKELOUS BROMIDE, AROMATIC PENTABROMO ETHYL BENZENE AND AROMATIC PENTABROMO TOLUENE, AND THEREAFTER ALLOWING THE MIXTURE TO FOAM.